meal-order-manager/terraform/iam_github_deploy.tf

# GitHub Actions OIDC role for the thin deploy-api.yaml caller of
# org reusable cd-hcp-fargate.yaml.

data "aws_iam_policy_document" "github_deploy_assume" {
  statement {
    sid     = "GithubDeployOidc"
    effect  = "Allow"
    actions = ["sts:AssumeRoleWithWebIdentity"]

    principals {
      type        = "Federated"
      identifiers = [local.github_oidc_provider_arn]
    }

    condition {
      test     = "StringEquals"
      variable = "token.actions.githubusercontent.com:aud"
      values   = ["sts.amazonaws.com"]
    }

    condition {
      test     = "StringEquals"
      variable = "token.actions.githubusercontent.com:sub"
      values = [
        "repo:Sea-Haven-Industries/meal-order-manager:environment:dev",
        "repo:Sea-Haven-Industries/meal-order-manager:environment:prod",
      ]
    }

    condition {
      test     = "StringLike"
      variable = "token.actions.githubusercontent.com:job_workflow_ref"
      values = [
        "Sea-Haven-Industries/.github/.github/workflows/cd-hcp-fargate.yaml@*",
      ]
    }

    condition {
      test     = "StringLike"
      variable = "token.actions.githubusercontent.com:workflow_ref"
      values = [
        "Sea-Haven-Industries/meal-order-manager/.github/workflows/deploy-api.yaml@refs/heads/main",
        "Sea-Haven-Industries/meal-order-manager/.github/workflows/deploy-api.yaml@refs/tags/v*",
      ]
    }
  }
}

data "aws_iam_policy_document" "github_deploy" {
  statement {
    sid    = "EcrAuth"
    effect = "Allow"
    actions = [
      "ecr:GetAuthorizationToken",
    ]
    resources = ["*"]
  }

  statement {
    sid    = "EcrPush"
    effect = "Allow"
    actions = [
      "ecr:BatchCheckLayerAvailability",
      "ecr:BatchGetImage",
      "ecr:CompleteLayerUpload",
      "ecr:GetDownloadUrlForLayer",
      "ecr:InitiateLayerUpload",
      "ecr:PutImage",
      "ecr:UploadLayerPart",
      "ecr:DescribeRepositories",
      "ecr:DescribeImages",
    ]
    resources = [aws_ecr_repository.api.arn]
  }

  statement {
    sid    = "EcsDeploy"
    effect = "Allow"
    actions = [
      "ecs:DescribeServices",
      "ecs:DescribeTaskDefinition",
      "ecs:DescribeTasks",
      "ecs:ListTasks",
      "ecs:RegisterTaskDefinition",
      "ecs:UpdateService",
    ]
    resources = ["*"]
  }

  statement {
    sid     = "PassTaskRoles"
    effect  = "Allow"
    actions = ["iam:PassRole"]
    resources = [
      aws_iam_role.ecs_task.arn,
      aws_iam_role.ecs_execution.arn,
    ]
  }

  statement {
    sid    = "DeployParams"
    effect = "Allow"
    actions = [
      "ssm:GetParameter",
    ]
    resources = [
      aws_ssm_parameter.deploy_cluster.arn,
      aws_ssm_parameter.deploy_service.arn,
      aws_ssm_parameter.deploy_task_family.arn,
      aws_ssm_parameter.deploy_ecr_repository.arn,
      aws_ssm_parameter.deploy_container_name.arn,
      aws_ssm_parameter.deploy_form_url.arn,
      aws_ssm_parameter.deploy_api_url.arn,
    ]
  }
}

resource "aws_iam_policy" "github_deploy_boundary" {
  name        = "${local.project}-githubdeploy-boundary"
  path        = "/tf-managed/"
  description = "Permissions boundary for githubdeploy-meal-order-manager"
  policy      = data.aws_iam_policy_document.github_deploy.json
}

resource "aws_iam_role" "github_deploy" {
  name                 = "githubdeploy-meal-order-manager"
  path                 = "/tf-managed/"
  description          = "GitHub Actions API image deploy for meal-order-manager"
  assume_role_policy   = data.aws_iam_policy_document.github_deploy_assume.json
  permissions_boundary = aws_iam_policy.github_deploy_boundary.arn
  max_session_duration = 3600
}

resource "aws_iam_role_policy" "github_deploy" {
  name   = "api-image-deploy"
  role   = aws_iam_role.github_deploy.id
  policy = data.aws_iam_policy_document.github_deploy.json
}